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  1. using System;
  2. using System.Security.Cryptography;
  3. using System.Text;
  4.  
  5. public class Test
  6. {
  7. 	static void Main( string[] args )
  8. 	{
  9. 	    string data = "hello";
  10. 	    Encrypt(data);
  11. 	}
  12.  
  13. 	static void Encrypt( string data )
  14. 	{
  15. 	    PaddingMode padding = PaddingMode.PKCS7;
  16. 	    CipherMode cipherMode = CipherMode.ECB;
  17. 	    int size = 128;
  18.  
  19. 	    Console.WriteLine("input: '" + data + "'");
  20.  
  21. 	    string officialKey = "9840822c-14fc-49ac-9d68-ac532f9f171e";
  22. 	    Console.WriteLine("key: '" + officialKey + "'");
  23.  
  24. 	    Console.WriteLine("block size: '16'");
  25. 	    Console.WriteLine( "padding: '11'" );
  26.  
  27. 	    var utf8dataBytes = Encoding.UTF8.GetBytes(data);
  28. 	    var utf8data = Encoding.UTF8.GetString(utf8dataBytes);
  29. 	    Console.WriteLine("utf8 json: '" + utf8data + "'");
  30.  
  31. 	    Console.WriteLine("encoded key (utf8): " + officialKey);
  32.  
  33. 	    var utf8KeyBytes = Encoding.UTF8.GetBytes(officialKey);
  34.  
  35. 	    var myMD5 = MD5.Create();
  36. 	    var md5HashOfKey = myMD5.ComputeHash(utf8KeyBytes);
  37.  
  38. 	    Console.WriteLine( "md5 hash of key (raw): " + DumpBinary(md5HashOfKey) );
  39. 	    Console.WriteLine("md5 hash of key (base64): " + Convert.ToBase64String(md5HashOfKey));
  40. 	    Console.WriteLine("BitConverter.ToString(md5HashOfKey): " + BitConverter.ToString(md5HashOfKey));
  41. 	    Console.WriteLine("BitConverter.ToString(md5HashOfKey).Replace(): " + BitConverter.ToString(md5HashOfKey).Replace("-",""));
  42.  
  43. 	    byte[] encryptedBlob = null;
  44.  
  45. 	    using ( var aes = new AesManaged() )
  46. 	    {
  47. 	        try
  48. 	        {
  49. 	            aes.Padding = PaddingMode.PKCS7;
  50. 	            aes.Mode = CipherMode.ECB;
  51. 	            aes.KeySize = 256;
  52. 	            aes.BlockSize = 128;
  53. 				aes.Key = Encoding.ASCII.GetBytes(BitConverter.ToString(md5HashOfKey).Replace("-","").ToLower());
  54.  
  55. 	            //aes.IV = new byte[] { 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0 };
  56.  
  57. 	            var bytes = utf8dataBytes;
  58. 	            //var bytes = ForcePaddingManually( utf8dataBytes );
  59.  
  60. 	            var cxform = aes.CreateEncryptor();
  61. 	            encryptedBlob = cxform.TransformFinalBlock( bytes, 0, bytes.Length );
  62. 	            Console.WriteLine("finished" + encryptedBlob.Length);
  63. 	        }
  64. 	        catch (Exception e)
  65. 	        {
  66. 	            Console.WriteLine("{0} Exception caught.", e);
  67. 	        }
  68. 	        finally
  69. 	        {
  70. 	            aes.Clear();
  71. 	        }
  72. 	    }
  73.  
  74. 	    //var encryptedBlob = AesAlgo.Encrypt( data, md5HashOfKey, padding, cipherMode, size );
  75. 	    Console.WriteLine("mcrypt (raw): " + DumpBinary(encryptedBlob));
  76. 	    Console.WriteLine("mcrypt: " + Encoding.UTF8.GetString(encryptedBlob));
  77.  
  78. 	    var encryptedBase64 = Convert.ToBase64String(encryptedBlob);
  79. 	    Console.WriteLine( "presid: " + encryptedBase64 );
  80.  
  81. 	    var encodedEncryptedBlob = encryptedBase64.Replace( "+", "-" ).Replace( "/", "_" );
  82. 	    Console.WriteLine( "sid: " + encodedEncryptedBlob );
  83. 	    Console.WriteLine("COMPLETE!");
  84. 	}
  85.  
  86. 	static byte[] ForcePaddingManually( byte[] data )
  87. 	{
  88. 	    // force padding manually to test that PKCS7 works like we are expecting
  89. 	    var pad = ( 16 - data.Length % 16 ) % 16;
  90. 	    var bytes = new byte[data.Length + pad];
  91. 	    for ( int i = 0; i < data.Length; ++i )
  92. 	    {
  93. 	        bytes[i] = data[i];
  94. 	    }
  95. 	    for ( int i = data.Length; i < data.Length + pad; ++i )
  96. 	    {
  97. 	        bytes[i] = (byte)pad;
  98. 	    }
  99.  
  100. 	    return bytes;
  101. 	}
  102.  
  103. 	static string DumpBinary( byte[] data )
  104. 	{
  105. 	    var sb = new StringBuilder();
  106. 	    for ( int i = 0; i < data.Length; ++i )
  107. 	    {
  108. 	        sb.Append( data[i].ToString( "X2" ) );
  109. 	    }
  110. 	    return sb.ToString();
  111. 	}
  112. }
Success #stdin #stdout 0.14s 24432KB
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stdin
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Standard input is empty
stdout
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input: 'hello'
key: '9840822c-14fc-49ac-9d68-ac532f9f171e'
block size: '16'
padding: '11'
utf8 json: 'hello'
encoded key (utf8): 9840822c-14fc-49ac-9d68-ac532f9f171e
md5 hash of key (raw): 6D334201CB7625323DA32E0C31B2B138
md5 hash of key (base64): bTNCAct2JTI9oy4MMbKxOA==
BitConverter.ToString(md5HashOfKey): 6D-33-42-01-CB-76-25-32-3D-A3-2E-0C-31-B2-B1-38
BitConverter.ToString(md5HashOfKey).Replace(): 6D334201CB7625323DA32E0C31B2B138
finished16
mcrypt (raw): B0D298C83D20A0CBB9F0EA4305CEF2EC
mcrypt: �Ҙ�= �˹��C���
presid: sNKYyD0goMu58OpDBc7y7A==
sid: sNKYyD0goMu58OpDBc7y7A==
COMPLETE!
https://ideone.com/dnJtRs
language:
C# (gmcs 5.20.1)
created:
8 years ago
visibility:
public

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